Masculine dossier · first seen 1975
Dillan
Endangered
Down 91.8% from peak
Peak era
1992
Peak births
341
Current vitality
Rare
Peak generation
Millennial
Quick answers about Dillan
How many people are named Dillan?
An estimated 6,865 living Americans are named Dillan.
How rare is Dillan?
Dillan is very rare among babies today, with 28 boys receiving the name in 2025, down 91.8% from its 1992 peak.
How old is the typical Dillan?
The median age of a living American named Dillan is approximately 24 years, with most bearers falling between 17 and 30 years old.
Is Dillan still popular?
No. Dillan is endangered as a baby name, down 91.8% from its 1992 peak with 28 births in 2025.
Where is Dillan most common?
Dillan has its strongest geographic signal in Louisiana, where it appears 2.7× more often than the national baseline.
1975Peak 19922025
Peak year
1992
Decline from peak
91.8%
2025
28
All-time
6,994
Where it lives now
Dillan is most concentrated in Louisiana — about 2.7× the national rate in the 1990s. It also runs high in Oklahoma and Utah.
States where Dillan is given more often than the national average — its present-day heartland.